Machine for removing cores from molds



H.'SCHELHAMMER. MACHINE FORREMOVING CORES FROM MOLDS.

APPLICATION FILED APR. 12, 1921.

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H. SCHELHAMMER. MACHINE FOR REMOVING'CORES FROM. MOLDS.

APPLICATION FILED AFR. i2, I921. 4 I

' Patented (Win17 1922. a -SHEETS SHEET 2.

H. SCH ELHAMMER. MACHINE FOR REMOVING CORES'F-ROM MOLDS.

APPLICATION FILED APR.-l2,- FBZL 1 Emma Oct. 117, 1922.

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Patented first. 1?, 13-2321.

an in ii is. o it n o HERMAN SGHELHAMIMELR, OF VTHITEElTONE LANDING, NEW YORK, ASSIGNOR '10 AIVIERICAN HARD RUBBER 00., 013 NEW YORK, N- Y., A CORPORATION OF NEW YORK.

Application filed April 12, 1921. Serial No. 460,767.

T 0 all whom it may concern Be it known that I, I'IERMAN SCHELHAB'P MER, a citizen of the United States, residing at VVhitestone Landing, in the county of Queens and State of New York, have in vented new and useful Improvements in Machines for Removing Cores from Molds, of which the following is a description, such as will enable others skilled in the art .to which it appertains to make and use the same.

This invention relates to machines for removing cores from molds, a principal ob]ect being to provide a machine of the above class constructed to support a multiplicity of molds and to impart rapid vibrations there- ,to to effectively shake out, or remove, the

cores therefrom.

1- further object being to provide a machine of the above class of simple, strong, inexpensive construction.

In the accompanying drawings there is illustrated different practical embodiments of the invention but the constructions shown therein are to be understood as illustrative only, and not as defining the limits of the invention.

Referring to the drawings Figure 1 is a sectional side elevation taken on the line 1-1 of Figure 3.

Figure 2 is a partial sectional plan view taken on the line 2-2 of Figure 3.

Figure 3 is a sectional end elevation taken on the line 3-3 of Figure 2.

Figure 4 is a sectional end elevation showing a modified form of construction.

Figure 5 is a fragmentary view of a portion of the construction shown in Figure 4.

Figure 6 is an end view showing a further modified form of construction.

Figure 7 is a plan view thereof.

In Figures 1, 2 and 3 of the drawings, 10 designates a suitable frame constituted by a base plate 11 and corner upright members 12, having horizontal bearings 13, for drive shafts 14, and provided at the top with vertical bearings or guides 15, to receive reciprocatory pins or bars 16, adapted to carry mold supporting vibratory tables 17 and which have pivotal connection at 18, with pitman-yokes 19 integrally formed with straps 20, to receive eccentrics 21, fixed to and revoluble with the drive shafts 14.

Power may be transmitted to the shafts 14, any approved manner as, for instance,

by means of a pulley 22, fixed to one shaft, and a belt 23 applied to said pulley, said shafts being connected for simultaneous operation by a cross shaft 24, and bevel gears 25, as shown.

In operation, a plurality of molds 26 are placed on the tables 17, as clearly shown in Figures 1 and 3 of the drawings, with the edges thereof resting on the inner edges of the tables which are spaced apart in parallelism to provide a clearance, through which the cores indicated at 27, may pass when shaken free from the molds as will be readily understood.

In Figures 4 and 5 of the drawings, there is illustrated a modified form of construction in which open cams 28, fixedly carried on'the shafts 14, are employed to reciprocate the pins or bars 16 through anti-friction rollers 29, mounted in yokes 30, said rollers being held in contact with the cams by push springs 31,;arranged between the yokes 30, and the bearings or guides 15.

In Figures 6 and 7 of the drawings there is illustrated a further modified form of construction, in which 32 designates a centrally arranged cylinder, having a piston 33 whose stem 34 carries a spider 35 having, in the form of construction shown, four arms 36, carrying the pins or bars 16, to support the mold tables-17.

In the operation of this form of construction, air under pressure is admitted to the cylinder 32 through a pipe 37 and passes across the cylinder around a circumferential channel 38 formed in the piston 33, and from thence through a bypass 39, back into the cylinder under the piston, and raises the same with its associated parts until an exhaust port 40 is uncovered, when the pressure is destroyed, permitting a spring 41 to return the piston to its normal. position, and this operation is repeated over and over again in rapid succession.

Of course it is desired to cover any equivas lent arrangement whereby the above action can be obtained.

To expedite and facilitate the shaking loose of the covers from their molds, cushions 42 may be employed, positioned so that the tables are slightly jarred at the end of the downward movement.

What I claim as my invention and desire to secure by Letters Patent, is

1.. In. a machine of t e la s de eri s i a vibrating said tables in unison. for the purpose specified;

In a machine of the class described, the combination with amold having a core pro" jecting therefron'i, of frame, re \ZOlllblG shafts and reciprocatory bars mounted1 in said frame, independent, spaced, mold: supporting tables on said bars and means on. sa d shafts for v brating the tables in un son for the purpose specified.

4L, Ina machine of the class described, a frame, shafts revolubly mounted therein, eccentrics on said,- shafts, vertical reeiprocatory bars operatively connected with said eccentrics, meanson said frame. for carrying said bars spacedindependent tables on said bars for carrying a series of molds having cores adapted to pnojectbetween said tables: and means for operating the shafts toyibrate the tables as-and; for the. purpose specified.

5. In a machine of the. classdescribed a frame, a pair of shafts connected one to the other for simultaneous rotation, reciprocatory bars carried by said frame, at the; corners thereof, for operatively connecting said bars to said shafts, mold'supports on said bars and devices on said shafts for vibrating said supports when the said shafts are operated.

6. In a machine of the class described, a

frame, comprising ,a base and corner up-' right members having vertical guides and horizontal bearings, reciprocatory bars in said guides, mold supporting tables on said bars, shafts rotatably mounted in said bearings, devices on said shafts having operative connection with said bars, and means for re volving said shafts to vibrate the tables for the. purpose specified.

In a machine of the class described,

pair of tables adapted to hold a series of molds therebetween with the cores of said molds projecting: between said tables, means for vibrating said tables in unison, and means for cushioning the blow resulting from the downward drop of said tables.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

HERMAN 'soH LHAMMER.

Vitnesses:

Gnome KOHLMEYER, CLAUDE E. WING. 

